Alonso extended the lead moments before the break, stabbing into the net from two yards thanks to Hudson-Odoi's brilliant assist.

In the second half, Giroud continued with his heroics, bagging his hat-trick of the night in the 59th minute with a powerful header from Willian's well-taken free-kick to put the game beyond the hosts.

Hudson-Odoi made it 5-0 for Sarri's men in the 78th minute after a smart run to slot home past the advancing goalkeeper, capitalising on Giroud's assist.